Add go with gccgo

Tuprules.tup

@@ -5,8 +5,12 @@ NIMFLAGS += -d:ssl
 NIMFLAGS += -d:threads
 NIMFLAGS += --verbosity:0
 
+GOFLAGS += -g
+
 !nim = |> nim c $(NIMFLAGS) -o:%o %f && rm -rf .nimcache |>
+!gccgo = |> gccgo $(GOFLAGS) -o %o %f |>
 
 : foreach *.moon |> moonc -o ../bin/%B.lua %f && chmod u+x ../bin/%B.lua |> ../bin/%B.lua
 : foreach *.nim |> !nim |> ../bin/%B
+: foreach *.go |> !gccgo |> ../bin/%B
 : foreach *.c |> gcc -o ../bin/%B %f |> ../bin/%B

src/golang_gccgo.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello, world!")
+}